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authorLinus Torvalds <torvalds@linux-foundation.org>2011-08-21 18:13:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-21 18:13:19 -0700
commit3210d190dcb717c328d74f8c3f69ec717d665b40 (patch)
tree4fbdbc85beea494165dc4bc8866f77051a730762
parent6719db6a23d4b7f1e5052eedae394135e3aef9c1 (diff)
parentaaff12039ffd812d0c8bbff50b87b6f1f09bec3e (diff)
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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: core: handle ack_busy when fetching the Config ROM
-rw-r--r--drivers/firewire/core-device.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 8ba7f7928f1..f3b890da1e8 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -455,15 +455,20 @@ static struct device_attribute fw_device_attributes[] = {
static int read_rom(struct fw_device *device,
int generation, int index, u32 *data)
{
- int rcode;
+ u64 offset = (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4;
+ int i, rcode;
/* device->node_id, accessed below, must not be older than generation */
smp_rmb();
- rcode = fw_run_transaction(device->card, TCODE_READ_QUADLET_REQUEST,
- device->node_id, generation, device->max_speed,
- (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4,
- data, 4);
+ for (i = 10; i < 100; i += 10) {
+ rcode = fw_run_transaction(device->card,
+ TCODE_READ_QUADLET_REQUEST, device->node_id,
+ generation, device->max_speed, offset, data, 4);
+ if (rcode != RCODE_BUSY)
+ break;
+ msleep(i);
+ }
be32_to_cpus(data);
return rcode;